Effect of topology on performance of reliable multicast communication |
| Pravin Bhagwat, Partho Mishra, S. K. Tripathi |
| The authors examine the performance implications of providing reliability
in conjunction with multicast transport over a high speed wide area network.
They use a block based acknowledgement and selective retransmission protocol
to evaluate the impact of the loss rate and the multicast tree topology
on the achievable throughput. Their results show that even when the buffer
overflow probability at switches and receivers is low, the cumulative loss
probability seen by a source may be quite high. They also demonstrate that
the average throughput increases significantly if the transport protocol
delivers packets to the application layer out-of-sequence. They investigate
the scaling properties of the error control mechanism and show that the
multicast tree topology that results in minimum transfer time is not necessarily
the same as the one constructed using minimal bandwidth or shortest path
algorithms
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| Paper (zipped postscript) |
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